Numbers 80756

The first number is 50% of the second, the second number is 40% of the third, and the third number is 20% of the fourth. The sum of the numbers is 396. Which numbers are these??

Correct answer:

a =  12
b =  24
c =  60
d =  300

Step-by-step explanation:

r1=50%=10050=21=0.5 r2=40%=10040=52=0.4 r3=20%=10020=51=0.2  s=396  s=a+b+c+d s =r1 b+r2 c+r3 d+d  s=r1 r2 r3 d+r2 r3 d+r3 d+d 396=0.5 0.4 0.2 d+0.4 0.2 d+0.2 d+d  1.32d=396  d=1.32396=300  d=300  c=r3 d=0.2 300=60 b=r2 c=0.4 60=24 a=r1 b=0.5 24=12
d=300  Verifying Solution:   s2=a+b+c+d=12+24+60+300=396



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